Age and Growth of the Two Japanese Scombropids, Scombrops boops and S.gilberti

概要

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Age and growth of the two Japanese representatives of the Scombropidae, Scombrops boops and S.gilberti, were examined by means of otolith reading.Examination of the marginal growth of the otolith showed the availability as annual rings of the outer margins of hyaline zones formed in the period from November to January.Growth of the two species was expressed by the von Bertalanffy's equation based on the estimation of standard lengths at the time of annual ring formation.As a result, it was revealed that S.gilberti is larger than S.boops in standard length up to two years of age, and then S.boops be-comes larger than S.gilberti.The estimated maximum standard length is 880 mm for S.boops and 514 mm for S.gilberti.Growth of S.boops estimated from length composition agreed well with that based on the otolith reading.Growth in terms of body weight was also examined.
日本魚類学会の論文